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Bland–Altman plots of the central corneal thickness (CCT) as measured by Pentacam against specular microscope in keratoconus (KCN) eyes with Vogt's striae (Top), without Vogt's striae (Bottom). The middle line in each figure is the mean difference of values, and the lines on the sides represent the upper and lower 95% limits of agreement (LoA) [mean difference ± 1.96 standard deviation (SD)].
